Endometriosis Doubles Migraine Risk in Major Analysis of 13 Million Women

A Hidden Connection Between Two Painful Conditions

Women suffering from endometriosis face more than twice the odds of experiencing migraines compared to women without the condition, according to a landmark analysis of more than 13 million women presented at the 151st Annual Meeting of the American Neurological Association in San Diego. The findings reveal a striking overlap between two conditions long treated as separate medical issues, suggesting that millions of women may be experiencing connected pain patterns that go unrecognized in routine clinical care.

The meta-analysis, led by Dr. Yohannes Woubishet Woldeamanuel of Mayo Clinic Arizona in Phoenix, reviewed 35 studies spanning five decades and encompassing 207,675 women with endometriosis and over 12.9 million women without the pelvic condition. The results showed that women with endometriosis had 2.3 times the odds of also having migraines, with the association remaining strong even after accounting for oral contraceptive use.

Why the Overlap Has Gone Unnoticed

One of the most alarming findings from the research is not just the strength of the association, but how thoroughly it has been missed in clinical practice. According to the study, short-term medical records failed to identify up to 90 percent of women who actually had both endometriosis and migraines. Patient interviews, by contrast, proved far more effective at detecting the overlap.

The researchers attribute this visibility gap to the way medicine is structured. Migraines are typically managed by neurologists, while endometriosis falls under the domain of gynecologists. Because the two conditions are treated by different specialists and recorded in separate medical systems, the connection between a woman’s headaches and her pelvic pain is rarely explored as a unified problem.

“There’s a visibility gap because migraine and endometriosis are treated by different specialists and recorded separately, making the overlap easy to miss,” Dr. Woldeamanuel explained. “As a result, women’s headaches and pelvic pain may be viewed as unrelated, even when they may be part of a broader pain pattern.”

The CGRP Connection: A Shared Pain Pathway

The research adds compelling evidence to a growing theory that migraine and endometriosis may share a common biological mechanism involving calcitonin gene-related peptide, or CGRP. This chemical messenger plays a central role in migraine attacks by transmitting and amplifying pain signals in the brain and triggering inflammation in nerve tissue.

Endometriosis tissue contains nerve fibers and immune cells associated with inflammation, and researchers believe CGRP may also contribute to the chronic pain experienced by women with the condition. This shared pathway could explain why the two disorders so frequently co-occur and why women with both conditions often report more severe and persistent pain.

The implications are significant. A new class of migraine medications known as CGRP inhibitors has shown remarkable efficacy in preventing migraine attacks. If CGRP also drives endometriosis-related pain, these same drugs could potentially offer relief for the pelvic pain that affects an estimated 190 million women of reproductive age worldwide.

What the Numbers Reveal

• 2.3x — The increased odds of migraine among women with endometriosis compared to those without
• 13 million+ — Total women analyzed across 35 studies spanning 1975 to 2026
• Up to 75% — Estimated proportion of women with endometriosis who may also suffer from migraines
• Up to 90% — Proportion of overlap missed by short-term medical records alone
• 50 years — Time span covered by the studies included in the meta-analysis

The Clinical Significance

For the millions of women living with endometriosis, the study underscores a critical message: their migraines and pelvic pain may not be coincidental. Dr. Megan Wasson, a study co-author also from Mayo Clinic Arizona, emphasized that women who suspect they have both conditions should communicate this to their physicians.

“Women who have — or think they may have — both migraine and endometriosis should understand it’s likely not a coincidence and tell their doctors about all of their symptoms,” Dr. Wasson advised.

This guidance is particularly important given the well-documented delays in diagnosing endometriosis, which can take an average of seven to ten years from the onset of symptoms. Women who report migraines alongside pelvic pain may help clinicians identify endometriosis earlier, potentially leading to more timely and effective treatment.

Toward Unified Treatment Approaches

The findings call for a paradigm shift in how these conditions are evaluated and managed. Rather than treating migraines and endometriosis in isolation, the research supports a more integrated approach that considers the possibility of shared pain mechanisms. This could mean that women presenting with chronic migraines should be screened for endometriosis symptoms, and vice versa.

Researchers are now calling for clinical trials to evaluate whether CGRP-targeting migraine medications could also relieve endometriosis-related pain. If confirmed, such treatments could represent a breakthrough for women whose pain has been inadequately managed by existing therapies, which often focus on hormonal suppression or surgery.

The Broader Context of Women’s Pain

This study arrives amid growing recognition that women’s pain has been systematically under-researched and undertreated. Endometriosis alone affects roughly one in ten women of reproductive age, yet receives a fraction of the research funding directed toward conditions of similar prevalence. The discovery of a shared pathway with migraine — another condition disproportionately affecting women — highlights the need for greater investment in understanding female-specific pain disorders.

The analysis also raises questions about how many other seemingly unrelated conditions in women’s health might share underlying mechanisms that current medical silos prevent us from seeing. As research techniques improve and large-scale data analyses become more accessible, previously hidden connections are likely to emerge, potentially reshaping how women’s health is understood and treated.

What Women Should Do Now

While clinical trials for CGRP inhibitors in endometriosis are still needed, women can take practical steps based on these findings. Keeping a detailed symptom diary that tracks both headache patterns and pelvic pain cycles can help physicians identify connections. Seeking care from specialists who are aware of the overlap — or bringing the research to your doctor’s attention — may lead to more comprehensive treatment plans.

The message from the research community is clear: if you experience both migraines and symptoms of endometriosis, you are not alone, and the connection is real. Advocating for comprehensive evaluation could be the first step toward more effective pain management and a better quality of life.

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Edited by Palawan @QUE.COM
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